Memo pad

ABSTRACT

A memo pad device for unrolling paper from a paper roll positioned at the head of the device and guiding the unrolled paper first beneath and then across a writing surface on the device so that the unrolled paper advances from the foot to the head of the device is described. The device enables a user to record a message continuously on the unrolled paper as it advances across the writing surface.

United States Patent Bosland et a1.

MEMO PAD Inventors: James M. Bosland, Wayne; James Hunter Giltzow,Roseland, both of NJ.

Ketcham & McDougall, lnc., Roseland, NJ.

Fi1ed: Apr. 23, 1971 App1 No.: 136,964

Assignee:

US. Cl. 281/11 Int. Cl B42d 19/00 Field of Search 281/6, 7, 8, 9, 10,11,

281/12,13,14;282/3 B, 4, 5, 6, 7,12 B, 13, 14,15 R, 15 A, 15 B, 16 R, 16A, 16 B, 16 C, 17,18 R, 18 A, 19 A, 19 B, 20 R, 20 A,

20 B, 21 R, 21 A, 21 8,21 C; 197/133 P References Cited UNlTED STATESPATENTS 1/1930 Moran 281/11 [451 Apr. 30, 1974 3,163,446 12/1964 Muncy281/11 2,680,029 6/1954 Gintovt 282/16 R 1,974,874 9/1934 Miller 282/12B 2,172,913 9/1939 Rose 282/21 C UX 1,551,930 9/1925 Buchheim.. 281/61,730,597 10/1929 Williams 281/8 Primary Examiner-Jerome SchnallAttorney, Agent, or FirmDarby & Darby ABSIRACT A memo pad device forunrolling paper from a paper roll positioned at the head of the deviceand guiding the unrolled paper first beneath and then across a writingsurface on the device so that the unrolled paper advances from the footto the head of the device is described. The device enables a user torecord a message continuously on the unrolled paper as it advancesacross the writing surface.

6 Claims, 7 Drawing Figures PATENTEDAmmau Y Islam-.770

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ll I 'H|l g INVENTORS' JAMES M. BOSLAND B JAMES HUNTER GILTZOW ATTORNEYSPmmwm mw 33071770 SHEUEUF 3 FIG. 3;

' INVENTORS JAMES M. BOSLAND 'BY J'AMES HUNTER GILTZOW A hs M ATTORNEYSPATENTEUAPRSOIQM $801,770- sumaurs A FIG. 5

I I I I I I 36 k .INVENTORS JAMES M. BOSLAND BY JAMES HUNTER GII TZOWATTORNEYS MEMO PAD The invention described herein relates, in general,to memo pad devices which are generally used for recording messages.

In devices of this general type heretofore available, a paper roll waspositioned at the head of the device. As paper was unrolled from theroll, the unrolled paper was guided across a writing surface so that itadvanced from the head to the foot of the device. A major problem withthese devices was the impossibility of recording a long message on theunrolled paper in a single continuous passage. This resulted because thehead to foot or top to bottom direction of the advancing unrolled papercoincided with the top to bottom direction of normal writing.Accordingly, when writing long messages using one of these priordevices, it was necessary to write a portion of the message equivalentto the length of the writing surface, advance the paper downwardly untilblank unrolled paper covered the writing surface and then continuewriting another portion of the message approximately equivalent to thelength of the writing surface. When the message was finally completedand the paper was torn off the device, the message on the paper appearedin segments or portions equal in length to the length of the writingsurface of the device with the first portion of the message being at thebottom of the unrolled paper and the last portion of the message beingat the top of the unrolled paper. Obviously, this was a veryunsatisfactory method of transcribing long messages on memo paper.

The device of this invention solved the abovementioned problem bycausing the unrolled paper in the device to advance forwardly from thebottom to the top of the device across a writing surface. This permits awriter to transcribe a portion of a message on a portion of the unrolledpaper equivalent in length to the length of the writing surface, advancethe unrolled paper until blank paper covers the writing surface, andcontinue writing the message in normal sequence. When the message iscompleted, the paper is torn off the device and can be read incontinuous sequence from the top of the paper to the bottom of .thepaper.

Another feature of the device of this invention is that the paper may beadvanced across the writing surface of the device in three differentways. The first and most convenient way is by depressing a bar on thewriting surface which actuates a motor to automatically advance thepaper forwardly. The second way is to manually turn a thumb wheelpositioned on the writing surface. The third way is to grasp the paperand manually pull it forwardly.

The automatic advancement of the paper by actuation of the motor iscaused by a gear train which is driven by the motor and which drives ashaft having circular drive wheels. A pressure bar positioned above thedrive wheels which is spring loaded downwardly forces the unrolled paperinto contact with the drive wheels so that it advances forwardly whenthe motor is actuated. Another feature of this invention is that meansare provided for disengaging the gear train from the drive shaft whenthe thumb wheel is used to manually advance the paper. This feature isimportant because it would otherwise be extremely difficult to manuallyadvance the paper by either pulling it by hand or by advancing it withthe thumb wheel since, to do so, it

would be necessary to overcome the resistance of the gear train and themotor. Further, rotation of the drive wheel shaft when the motor was notactuated could easily damage the drive gears.

Another feature of the device of this invention is that means areprovided for tearing off a portion of the paper after a message has beenrecorded. As mentioned above, the pressure bar at the top of the writingsurface is spring-loaded downwardly to cause the paper to contact thedrive wheels. The forward or leading edge of this pressure bar issharpened and turned slightly upwardly so that when the paper ismanually pulled rearwardly it will be torn free from the device.

Another feature of the device of this invention is that means areprovided for causing the unrolled paper to lie flat on the writingsurface of the device. In order to have the paper advance from the footto the head of the device and still have the paper roll positioned atthe head of the device so it does not interfere with the hand of thewriter, it is necessary to first loop the unrolled paper beneath thewriting surface, then guide the paper through a slot at the foot of thewriting surface and finally guide the paper across the writing surfaceand under the pressure bar positioned at the head of the writingsurface. Normally, this looping path of travel would result in the paperon the writing surface bowing upwardly. By a combination of verticalribs and a reserve S-shaped plate positioned beneath the slot at thefoot of the writing surface, and the pressure bar at the head of thewriting surface, the bow is removed and the paper lies flat on thewriting surface.

Another feature of the device of this invention is that means areprovided for disengaging the contact between the pressure bar and thedrive rollers when the paper is being manually pulled forwardly. This isaccomplished by allowing the spring-loaded pressure bar to rise when thepaper is advanced, thus releasing the contact pressure of the rollers.This permits the paper to be advanced across the writing surfacerelatively easy since it is not necessary to overcome the friction ofthe drive rollers as the paper is being pulled forwardly. I

Another feature of this device is that wear on the drive rollers iscompensated for by the spring biasing of the bar member against therollers.

These and other objects and features of this invention will be morereadily understood and appreciated by reference to the followingdescriptions and drawings in which:

FIG. 1 is a perspective view of a memo pad device;

FIG. 2 is an enlarged cross-sectional view of the device of FIG. 1taken-along the line 2,-2;

FIG. 3 is a bottom view of the device illustrated in FIG. 2 withportions cut away to show the internal mechanisms of the device;

FIG. 4 is a cross-sectional view of the device illustrated in FIG. 3taken along the line 4-4 showing the motor and gear train;

FIG. 5 is a cross-sectional view of the device illustrated in FIG. 2taken along the line 5-5;

FIG. 6 is an enlarged cross-sectional view of the foot portion of thedevice illustrated in FIG..2; and

FIG. 7. is a front elevational view with part cut away of the footportion of the device illustrated in FIG. 2.

Referring now to FIG. 1, a memo pad device is illustrated. The deviceconsists of an upper housing 12 and a lower housing 22. Paper 14 isunrolled from a roll of paper housed beneath the roll cover 20, acrossthe bottom of the device, out through a slot 13 at the foot of thedevice across the writing surface 15 of the device and beneath apressure bar 18. In order to advance the paper forwardly in thedirection of the arrow in FIG. 1, the user may either depress the bar 17which actuates the motor and causes automatic advancement of the paper,manually turn the thumb wheel 16, or grasp the leading edge of the paperand pull it forwardly. When the user wishes to tear off a portion of thepaper from the device, the user. merely pulls the paper rearwardly sothat it engages the upwardly turned lip 19 on the pressure device. Theupwardly turned lip 19 is made sufficiently sharp to tear the paper.

Referring now to FIGS. 2 and 3, the paper roll 24 is mounted on acircular shaft 28 which is supported by vertically extending supportmembers 26 on each of the lateral sides of the device. The supportmembers 26 each have a hook-shaped portion for receiving the shaft 28.The vertically extending support members 26 are molded into the lowerhousing 22 of the device. Vertically extending ribs 30A,30B and 30C aremolded into the lateral sides of the upper housing 12. These ribs serveto locate the position of the vertically extending support members 26 sothat when a new roll of paper is inserted into the device from the top,the paper roll shaft 28 will slip into the hook-shaped opening on thesupport members. The paper roll cover is relatively flexible so that itcan be easily removed and snapped back into place in the upper housing22 after a new roll of paper has been inserted.

Referring now to FIGS. 1,2,3 and 5, the mechanisms by which the paper isadvanced forwardly (in direction of the arrow illustrated in FIG. 1)across the writing surface 15 are illustrated. As previously indicated,one method of advancing the paper is by manually turning the thumb wheel16. Thumb wheel 16 is attached to a shaft 48 which is supported beneaththe writing surface of the device. Roller wheels 50 are also attached tothe shaft 48. The roller wheels 50 are preferably made of rubber or someother high friction material in order to grasp the paper and advance itforwardly. As best illustrated in FIGS. 2 and 5, the horizontallyextending pressure bar 18 has a vertical component 36 on each lateralside of the device. Each of the vertical components 36 has a first slot48' and a second slot 46' which permit vertical movement of the pressurebar 18 with respect to the fixed shafts 48 and 46. A third slot 49 isformed in each of the vertical components 36. The

third slot 49' is formed by punching out a portion of the verticalcomponent 36 and bending it inwardly to form a horizontally extendinglip 49.

The lip 49 extends into a slot 51 which is formed in the vertical wall40D in FIG. 2 which illustrates the right side of the device. (On theleft side of the device, slot 51 is formed in wall 40C. The structureand operation of the left side vertical component 36 are not describedsince they are substantially similar to the structure and operation ofthe right side vertical component 36 illustrated in FIG. 2). Thus,horizontally extending lip 49 extends into slot 51 so that as thevertical component 36 moves upwardly or downwardly with respect to fixedshafts 48 and 46, lip 49 similarly moves upwardly and downwardly withinthe fixed slot 51.

Referring to FIG. 2, slot 49 is shown in solid lines. The lowermostsolid line which illustrates the bottom edge of slot 49' also definesthe top surface of the inwardly extending horizontal lip 49. Since lip49 extends into the plane of the paper in FIG. 2, only its top surfaceis visible. The slot 51 which is formed in vertical wall 40D ispositioned directly behind and in alignment with the slot 49'. The widthof slot 51 is co-extensive with the width of slot 49. However, thelength of slot 51 is slightly greater than the length of slot 49'. Theextended length of slot 51 is illustrated in FIG. 2 by the dotted linesbeneath the solid lines which represent slot 49. The remaining portionof slot 51 (that is, the portion above the dotted lines) is co-extensivewith slot 49, and therefore is co-extensive with the two vertical solidlines and the uppermost horizontal solid line which represent slot 49.

The lowermost leg of the generally U-shaped spring member 38 ispositioned against the top side of the horizontally extending inwardlyturned lip 49. Since the uppermost leg of the spring 38 is positionedagainst the fixed shaft 46, the lowermost leg of the spring 38 exerts aforce against the top side of the lip 49 thereby urging the lip (andconsequently, the vertical component 36) vertically downwardly. Thus,the action of the springs 38 on the left and right sides of the devicecause the pressure bar 18 to be biased downwardly against the rollers 50thereby urging the paper into frictional contact with the rollers.However, slots 46 and 48' in the bar vertical components 36 and slots 51in the vertical walls 40C and 40D permit the bar to be raised verticallyupwardly when paper is manually pulled out from the device. Thus, whenpaper is manually advanced by grasping the paper and pulling itforwardly the horizontally extending pressure bar 18 is lifted from therollers 50. This permits the paper to be easily pulled out from thedevice since it is not necessary to overcome the friction of the rollers50.

Referring to FIGS. 3 and 5, horizontal wall 40B is positioned beneaththe writing surface 15. Horizontal wall 40B is attached to the undersideof writing surface 15 by screws 101 which are threaded throughhorizontal wall 408 into bosses 103 formed on the underside of writingsurface 15. Referring to FIG. 5, vertical walls 40A and 40C dependdownwardly from horizontal wall 408. Vertical walls 40A and 40C supportshaft 48 on which the rollers 50 are mounted. As illustrated in FIG. 3,vertical wall 40D is attached to vertical wall 40A by screws which arethreaded into wall 40A.

A thirdway to advance the paper across the writing surface 15 is bydepression of the bar 17 on the upper housing of the device. As bestillustrated in FIGS. 3 and 4, the bar 17 is electrically connected to amotor 52 which is supported beneath the writing surface of the device.The electrical connection of the bar 17 to the motor 52 can beaccomplished by any means well known in the art such as, for example,connecting one wire from the power source (the batteries in this case)to an electrical conducting element 17A positioned beneath but separatedfrom the bar 17. Other electrical conducting elements 178 are attachedto the bar 17 and are electrically connected to the motor 52 by wires orthe like. Depression of the bar 17 brings the two electrical conductingelements 17A and 178 into contact thereby completing the circuit fromthe power source to the motor and energizing the motor. As is well knownin the art, the two electrical conducting elements are biased out ofengagement with one another (by a spring or the like) so that a forcemust be applied on bar 17 to bring them into engagement. Energy for themotor is supplied by batteries which are located in a compartment in theunderside of the device. A door 62 covers the battery compartment. Alatch 64 on the door permits it to be opened to replace worn batteries.The depression of the switch 17 causes the batteries to energize themotor 52. The motor 52 is supported by bracket 54 on wall 40A. Shaft 52is the output shaft of motor 52. The rotation of shaft 52' results inthe rotation of gear 60 which is attached to shaft 52. The gear train 58which connects the gear 60 to the main drive shaft 48 is positionedbetween walls 40A and 40D beneath the writing surface of the device. Thegear train 58 is best illustrated in FIG. 4. Gear 60, through the geartrain 58 and in a manner well known in the art, causes rotation of maindrive shaft 48. Accordingly, depression of the bar 17 actuates the motorcausing gear 60 to rotate in a clockwise direction. The rotation of gear60 is transmitted through the gear train 58 to gear 72 so that shaft 48is rotated in a clockwise direction. The circular rollers 50 attached toshaft 48 engage the paper and cause it to advance forwardly.

It should be noted that the gear 72 and the thumb wheel 16 are bothoperably connected to shaft 48. If no provision were made fordisengaging the gear train 58 from the main drive shaft 48, it would bealmost impossible to turn the thumb wheel 16. Even if the thumb wheelcould be turned, it might result in damage to the gear train.Accordingly, a spring clutch 56 is provided to disengage the shaft 48(which is rotatable within the gear 72) from the gear 72 when the thumbindex is employed. The spring clutch consists of a wire spring woundaround the shaft 48 and connected through the gear 72. As illustrated inFIG. 4, one end of the spring clutch 56 passes through a first aperture72 in gear 72 and passes back through a second aperture 72" so that theend of the spring clutch is secured to the gear. Starting from the gear72, the wire is wound counterclockwise about the shaft. The other end ofthe wire 56 is free; that is, it is not attached to the shaft. When thegear 72 is rotated in a clockwise direction (from the view illustratedin FIG. 4), the wire imparts rotational movement in the clockwisedirection to the shaft 48. This is accomplished because the clockwiserotation of gear 72 causes the wire spring 56 to tighten around shaft48. However, when the thumb wheel is rotated in a clockwise direction(from the view of FIG. 4), the shaft rotates independently of the gear72 and consequently the gear is not rotated. This is accomplishedbecause the counterclockwise rotation of the shaft 48 prevents thecounterclockwise wound wire spring 56 from tightening on the shaft 48.The wire spring clutch 56 desclosed here is merely a type of frictionalclutch. The frictional drag on the counterclockwise wound wire which isinduced by clockwise rotation of the shaft 48 causes a tightening of thewire on the shaft; counterclockwise rotation of the shaft induces nofrictional drag thereby preventing tightening of the wire 56 on theshaft 48.

An alternate mechanism to disengage the gear train from the main driveshaft when the thumb wheel is employed is the use of a slip gear. Forexample, in FIG. 4, shaft 65 of gear 66 is free to move in vertical slot65'.

When the motor causes gear to rotate in a clockwise direction, gear 66is forced downwardly in slot and into engagement with gear 68. Thisresults in rotation of the main shaft 48. However, when the thumb wheelis moved in a clockwise direction, gear 68 is also caused to rotate in aclockwise direction. Since gear 68 is positioned beneath the gear 66 andsince shaft 65 is free to move upwardly in a vertical direction, gear 66slips upwardly out of engagement with gear 60. This prevents increasedresistance on the thumb wheel and also prevents damage to the drivemechanism.

Referring now to FIGS. 2, 3, 6 and 7, the mechanisms by which the paperis forced to lie flat on the writing surface 15 are illustrated. Fromthe roll of paper 24, the paper 14 is guided over the bottom of thedevice to a slot 13 at the foot of the device. A reverse S-shaped member32 is positioned at the slot 13. The reverse S- shaped member 32 extendsthe width of the device and forms one wall of the slot 13. Verticallyextending ribs 34 which are molded into the lower housing are spacedacross the width of the device. The reverse S-shaped member'32 and thebaffles 34 coact with the pressure bar 18 to restrict the movement ofthe paper and prevent the unrolled paper from bowing upwardly on thewriting surface of the device. This, of course, makes the paper easierto write on.

While the principles of the invention have now been I made clear in theillustrative embodiments, there will be immediately obvious to thoseskilled in the art that many modifications in structure, arrangement,proportions, the elements, materials, and components, used in thepractice ofthe invention, and otherwise which are particularly adaptedfor specific environments and operating requirements, without departingfrom those principles. The appended claims are, therefore, intended tocover and embrace any such modifications, within the limits only of thetrue spirit and scope of the invention.

What is claimed is:

l. A memo pad device for use with a paper roll including a flat memberhaving first and second ends, means positioned adjacent said fiat memberfirst end for supporting the paper roll, means positioned adjacent saidflat member first end for advancing paper from said supporting means tosaid flat member and for further advancing paper across said fiat memberfrom said flat member second end to said flat member first end, saidadvancing means including a laterally extending rotatable memberpositioned beneath the top surface of said fiat member, means mounted onsaid rotatable member for frictionally engaging the paper, saidadvancing means further including first gear means p0- sitioned at oneend of said rotatable member, and motor'means positioned beneath saidflat member for driving said first gear means in order .to automaticallyrotate said rotatable member to advance the paper, said advancing meansfurther including a wheel positioned at one end of said rotatable memberfor manually rotating said rotatable member in a first rotationaldirection to advance the paper independently of said motor means; ahorizontal wall and at least two vertical walls, said horizontal wallbeing attached to the underside of said flat member; said vertical wallsextending downwardly from said horizontal wall; means for forcing thepaper into frictional contact with said paper engaging means including aspring member adjacent each of said vertical walls, each spring memberhaving a first end and a second end, a generally U-shaped bar having ahorizontal component and two vertical components, said bar horizontalcomponent extending across the top surface of said flat member and beingpositioned above said paper engaging means, each of said bar verticalcomponents being positioned directly adjacent one of said verticalwalls, a first horizontal member extending from each of said verticalwalls towards one of said bar vertical components for engaging one endof the adjacent spring member, a second horizontal member extending fromeach of said bar vertical components towards one of said vertical wallsfor engaging the other end of said adjacent spring member, said springmembers biasing said bar horizontal component into engagement with saidpaper engaging means for forcing the paper into frictional engagementwith said paper engaging means, said spring members being sufficientlyresilient to permit said bar horizontal component to be lifted away fromsaid paper engaging means by manually grasping the paper and pulling itupwardly against said bar horizontal component whereby the paper may bemanually grasped and pulled forward.

2. The memo pad device recited in claim 1, each of said bar verticalcomponents having a first slot and a second slot, said first and secondslots being vertically oriented, the ends of said laterally extendingmember being positioned within said bar vertical component first slots,each of said vertical wall first horizontal members being positionedwithin said bar vertical component second slots.

3. The memo pad device recited in claim 2, each of said vertical wallshaving a third slot said third slot being vertically oriented, each ofsaid bar vertical components having an inwardly turned lip, said lipsbeing positioned within said third slots; said spring member having afirst leg and a second leg, said spring first leg being positioned tobear against the bottom surface of said vertical wall first horizontalmember, said spring member second leg being positioned to bear againstthe top surface of said bar vertical component lip.

4. The memo pad device recited in claim 1, means for disengaging saidrotatable member from said motor means during manual rotation of saidrotatable member.

S. The memo pad device recited in claim 4, said disengaging meansincluding a wire, one end of said wire being attached to said gearmeans, said wire from said gear means being wound about said rotatablemember in a second rotational direction opposite to said firstrotational direction, the second end of said wire being free.

6. The memo pad device recited in claim 4, said disengaging meansincluding second and third gear members, said second and third gearmembers being mounted on a second shaft; one of said bracket verticalwalls having a fourth slot, said fourth slot being vertically oriented,said second shaft being slidably positioned within said fourth slot; afourth gear member in operative engagement with said second gear memberand a fifth gear member in operative engagement with said third gearmember whereby rotation of said fourth gear member causes said thirdgear member to operatively engage said fifth gear member and rotation ofsaid fifth gear member causes said second shaft to move upwardly in saidfourth slot so that said second gear member is out of operativeengagement with said fourth gear member.

1. A memo pad device for use with a paper roll including a flat memberhaving first and second ends, means positioned adjacent said flat memberfirst end for supporting the paper roll, means positioned adjacent saidflat member first end for advancing paper from said supporting means tosaid flat member and for further advancing paper across said flat memberfrom said flat member second end to said flat member first end, saidadvancing means including a laterally extending rotatable memberpositioned beneath the top surface of said flat member, means mounted onsaid rotatable member for frictionally engaging the paper, saidadvancing means further including first gear means positioned at one endof said rotatable member, and motor means positioned beneath said flatmember for driving said first gear means in order to automaticallyrotate said rotatable member to advance the paper, said advancing meansfurther including a wheel positioned at one end of said rotatable memberfor manually rotating said rotatable member in a first rotationaldirection to advance the paper independently of said motor means; ahorizontal wall and at least two vertical walls, said horizontal wallbeing attached to the underside of said flat member; said vertical wallsextending downwardly from said horizontal wall; means for forcing thepaper into frictional contact with said paper engaging means including aspring member adjacent each of said vertical walls, each spring memberhaving a first end and a second end, a generally U-shaped bar having ahorizontal component and two vertical components, said bar horizontalcomponent extending across the top surface of said flat member and beingpositioned above said paper engaging means, each of said bar verticalcomponents being positioned directly adjacent one of said verticalwalls, a first horizontal member extending from each of said verticalwalls towards one of said bar vertical components for engaging one endof the adjacent spring member, a second horizontal member extending fromeach of said bar vertical components towards one of said vertical wallsfor engaging the other end of said adjacent spring member, said springmembers biasing said bar horizontal component into engagement with saidpaper engaging means for forcing the paper into frictional engagementwith said paper engaging means, said spring members being sufficientlyresilient to permit said bar horizontal component to be lifted away fromsaid paper engaging means by manually grasping the paper and pulling itupwardly against said bar horizontal component whereby the paper may bemanually grasped and pulled forward.
 2. The memo pad device recited inclaim 1, each of said bar vertical components having a first slot and asecond slot, said first and second slots being vertically oriented, theends of said laterally extending member being positioned within said barvertical component first slots, each of said vertical wall firsthorizontal members being positioned within said bar vertical componentsecond slots.
 3. The memo pad device recited in claim 2, each of saidvertical walls having a third slot said third slot being verticallyoriented, each of said bar vertical components having an inwardly turnedlip, said lips being positioned within said third slots; said springmember having a first leg and a secoNd leg, said spring first leg beingpositioned to bear against the bottom surface of said vertical wallfirst horizontal member, said spring member second leg being positionedto bear against the top surface of said bar vertical component lip. 4.The memo pad device recited in claim 1, means for disengaging saidrotatable member from said motor means during manual rotation of saidrotatable member.
 5. The memo pad device recited in claim 4, saiddisengaging means including a wire, one end of said wire being attachedto said gear means, said wire from said gear means being wound aboutsaid rotatable member in a second rotational direction opposite to saidfirst rotational direction, the second end of said wire being free. 6.The memo pad device recited in claim 4, said disengaging means includingsecond and third gear members, said second and third gear members beingmounted on a second shaft; one of said bracket vertical walls having afourth slot, said fourth slot being vertically oriented, said secondshaft being slidably positioned within said fourth slot; a fourth gearmember in operative engagement with said second gear member and a fifthgear member in operative engagement with said third gear member wherebyrotation of said fourth gear member causes said third gear member tooperatively engage said fifth gear member and rotation of said fifthgear member causes said second shaft to move upwardly in said fourthslot so that said second gear member is out of operative engagement withsaid fourth gear member.